OFBIZ-5004: an IllegalArgumentException is thrown if an attempt to select an invalid field is performed; the code was just logging a warning message. Thanks to Christoph Neuroth, Adrian Crum, Paul Foxworthy, Scott Gray, Jacques Le Roux, Adam Heath for their valuable feedback and comments. 



git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1646666 13f79535-47bb-0310-9956-ffa450edef68